.ban_box{
    width: 100%;
    position: relative;

}
.ban_box img{
    width: 100%;
}
.meng{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    opacity: 0.3;
}
.ab_us{
    position: absolute;
    bottom: 130px;
    left: 100px;
    font-size: 46px;
    font-weight: 600;
    color: #fff;
}
.b1_box{
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 100px;
    box-sizing: border-box;
    margin: 50px;
}
.b1_left{
    width: 47%;
    display: flex;
    flex-direction: column;
    gap: 50px;
}
.le_li{
    display: flex;
    gap: 15px;
    align-items: center;
}
.le_li img{
    width: 50px;
    height: 50px;
}
.le_nei{
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.le_nei span{
    font-weight: 600;
}
.b1_ri{
    width: 47%;
}
.b1_ri img{
    width: 100%;
}
.b2_box{
    width: 100%;
    margin-top: 50px;
    position: relative;
    height: 660px;
}
.meng1{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    opacity: 0.3;
}
.b2_box img{
    width: 100%;
    height: 100%;
}
.baioge{
    position: absolute;
    top: 50px;
    left: 100px;
    width: calc(100% - 200px);
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.biao_title{
    font-size: 30px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    text-align: center;
}
.input_box{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}
.input_box input{
    width: 42%;
    height: 50px;
    padding: 10px;
    box-sizing: border-box;
    background-color: #fff;
    color: #012DA7;
    border: 2px solid #012DA7;
}
#message{
    width: 100%;
    height: 200px;
    padding-left: 10px;
    box-sizing: border-box;
    color: #012DA7;
    border: 2px solid #012DA7;
}
.but_b{
    background-color: #fff;
    color: #012DA7;
    width: 100px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px auto;
    cursor: pointer;
}
.but_b:hover{
    background-color: #012DA7;
    color: #fff;
}
@media (max-width: 768px){
    .ab_us{
        left: 30px !important;
        bottom: 30px !important;
        font-size: 20px !important;

    }
    .b1_box{
        flex-direction: column !important;
        padding: 10px !important;
        margin: 30px 0 !important;
        gap: 30px;
    }
    .b1_left{
        width: 100% !important;
    }
    .b1_ri{
        width: 100% !important;
    }
    .baioge{
        left: 10px !important;
        width: calc(100% - 20px) !important;
    }
}